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Water 2017, 9(6), 371;

Improving the Viability of Stormwater Harvesting through Rudimentary Real Time Control

Department of Civil Engineering, University of Cape Town, Private Bag Rondebosch 7700, South Africa
Author to whom correspondence should be addressed.
Academic Editor: Alberto Campisano
Received: 27 March 2017 / Revised: 12 May 2017 / Accepted: 22 May 2017 / Published: 25 May 2017
(This article belongs to the Special Issue Advances on Urban Stormwater Harvesting Strategies)
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Stormwater Harvesting (SWH) to alleviate water scarcity is often hindered by the lack of suitable available storage in urban areas. This research aimed to discover an economically viable strategy of storing runoff in existing stormwater ponds with the assistance of rudimentary Real Time Control (RTC) techniques to increase the effective storage capacity. The Diep River sub-catchment situated in the southern suburbs of Cape Town, South Africa, that has several stormwater ponds that were largely constructed for the purposes of flood mitigation, was used as a case study. Six SWH scenarios utilising three distinct RTC strategies coupled with two alternative water demand alternatives were simulated with the aid of 10 years’ of historical rainfall data with a view to determining the unit cost of supplying selected developments with non-potable water. The use of RTC to increase the effective storage of the ponds was shown to improve the volumetric yield without significantly impairing the flood mitigation provided by the system at a cost that was comparable to what the local residents were already paying for potable water. This finding is important as it suggests a cost-effective way of overcoming one of the greatest limitations associated with stormwater harvesting. View Full-Text
Keywords: Stormwater Harvesting; stormwater ponds; real time control; water security Stormwater Harvesting; stormwater ponds; real time control; water security

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Rohrer, A.R.; Armitage, N.P. Improving the Viability of Stormwater Harvesting through Rudimentary Real Time Control. Water 2017, 9, 371.

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